- I already knew why he changed his route.
- Knew what?
- He was afraid I'd see some naked white girl down the block.

Virgil Tibbs (Sidney Poitier)

6 seconds sound clip from the In the Heat of the Night (1967) movie soundboard.

You can hear this line at 01:23:45.322 in the Blu-ray version of the movie.

Quote context

[...]

- And when I got up to $600, I took it down and put it in the bank. It's simple as that.

- Well, all I know is that the day Colbert was killed, he cashed a check for $900, $600 of which is missing, $300 which I believe you left in the wallet as sucker bait for some poor kid, like that Harvey Oberst.

- What kind of man do you think I am?

- Now, don't you push me, boy!

- Now listen, if you weren't suspicious of Sam here, why did you question him last night when he changed his route?

- I already knew why he changed his route.

- Knew what?

- He was afraid I'd see some naked white girl down the block.

- What you talkin' about, naked white girls?

- Some girl named Delores Purdy. She parades around in the nude at night to get her kicks. That's...

- And how do you know?

- I know, I know.

- Well, I know, you understand?

- I know that Colbert cashed a check for $900.

- I know that Sam made a big cash deposit.

[...]